Hi, > We do not detect jobserver because of Dejagnu is not using it. > And yes, we default to -flto=<numthreads> in LTO tests now. That's > what is causing issues right now.
Why the error messages are make[4]: *** write jobserver: Bad file descriptor. Stop. make[4]: *** Waiting for unfinished jobs.... make[4]: *** write jobserver: Bad file descriptor. Stop. It seems to me that it is internal make from lto-wrapper trying to get jobserver access? > Works for me. We probably also can give it a meaning controlling the default parameter of -flto. I.e. setenv GCC_LTO_PARALLELISM <numthreads/auto/jobserv> which we will default to in case only -flto is passed to command line. Make's jobserver is quite nice and easy to use. If it supported named pipe and there was a small library which allowed to initialize jobserver and connect to it, perhaps other tools needing parallelism during build (GCC, ninja, llvm, ...) would be able to use common protocol. Honza
